Improvement in machines for cutting wood gear



UNITED STATES PATENT OFFICE.

CHRISTOPHER R. JAMES, OE JERSEY CITY, NEW JERSEY.

Spccication forming part of Letters Patent No. 4 9,881, dated September12, 1865.

To all whom it may concern Beit known that I, CHRISTOPHER R. J AMES, ofJersey City, in the county of Hudson and State of New Jersey, haveinvented a new and useful Improvement in Machinery for Cutting the Teethof Wooden Gear-Wheel Patterns; and I do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings,forming part ot' thisspeciiication, in which- Figure l is a plan of a machine withInyimprovement. Fig. 2 is an end elevation.

The same letters of reference designate the same part of the machine inboth gures.

The nature of my invention consists in an improvement in machinery forcutting the teeth of wooden gear-wheel patterns, by use of which muchtime is saved and perfect uniformity ot' the teeth and spaces isobtained without the necessity ot' marking them out before cutting.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

I provide a suitable horizontal frame-work, A, like the bed of a lathe,upon one end ot which I place proper standards B, to support a mandrelor spindle, C, with pulleys D, and a dividing-plate, E, like theface-plate of a lathe, the said plate being constructed in such a mannerthat a wooden blank-wheel, E, can be firmly attached to it, and byvmeans ot' a stop, Gr, entering one ot' a circular series ot'equidistant notches, s s, corresponding in number with the intendednumber of teeth to be cut in the gear-wheel pattern, may be held in anyrequired position. I further provide upon the frame-work or bed-plate Aan adjustable support, H, having a sliding toolcarriage, I, which can bemoved forward and back in a line parallel with the axis of thedividing-plate spindle C, and for this purpose heilig provided with ascrew, K, and crank Ii. The sliding piece I carries a spindle, M, placedat right angles with the dividing-plate spindle C, with the axes of bothspindles in one plane. To the outer end of the spindle M I attach asmall pulley, N, and a small ily- Wheel, O, and to the inner end I adx acutter, P, by means ot' a screw, or in any other suitable way. Thiscutter P is made with a sharp cutting-edge, like a knife, and of a formcorresponding exactly with the prolc shape of one side of a toothintended to be cnt and one-half part of the space between two teeth.

Operation: The different parts having been constructed as described andproperly adjusted, a wooden blank-wheel, F, is attached to thedividing-plate E. The said plate is secured by placing the stop Cr inone of its notches s s. A belt is put around the pulley N and around apulley which may be setin motion by steam or any other suitable power.Then, by rot-ary motion being imparted to the cutter P, While the latteris brought in contact with the wooden blank-wheel and gradually advancedacross the periphery thereotl by means of the screw K, the cutter P willcnt out the space R between two teeth, as shown in Fig. 2.

After one space has been out out, then the cutter is withdrawn, the stopG removed from the notch s, the dividingfplate E is turned around to thedistance of one notch s, and the stop Gr applied therein, and the sameop eration is gone through as with the cutting out ot' the first space,and the operation is repeated till the teeth and spaces have been cutall around the pattern.

It is necessary to set the cutter-spindle M with care, so that the axisotl the spindle C and the axis of the spindle M shall be in one plane,in order to have the teeth stand in a proper position and not leantoward one side. A one-edged cutter, made as described and attached to aspindle thus set, will out the teeth more accurately than can be done by4any other method, as one and the same cutting-edge 'shapes both sidesof the tooth, and does it in one operation. It also saves a great dealof time, as it dispenses with the laying out the teeth and cutting andshaping them by hand, or having each tooth inserted into the wheelseparately, as has been done heretot'ore.

The cutter P will require to be changed for one ot' a different size andform to cut teeth having a wider or narrower space between them or of adifferent form.

Having thus fully described my invention, what I claim therein as new,and desire to secure by Letters Patent of the United States,

The arrangementof the sliding cutter-carriage, the revolvingcutter-stock M and cutter P, and the revolving dividing-plate E,substantially as and for the purpose herein specified.

Witnesses: C. R. JAMES.

LANGE HoLMEs, J r., GEO. W. REED.

